Brighton and Hove · England
External & façade joints in Seven Dials, Brighton and Hove
Sealing brickwork movement joints, render, cladding and façade joints for homeowners, landlords and businesses in Seven Dials. Fully insured, ARBOMaster approved and guaranteed for a year.
- Weathered mastic that no longer stretches
- Rain getting behind render or cladding at a joint
- Sealant pulling away from one side of the joint
Common questions in Seven Dials
Does living near the coast affect external mastic in Seven Dials?
Coastal weather is harder on outside sealant: there’s more wind-driven rain and, closer to the shore, salt in the air. Choosing the right sealant for the frame and wall, laid at the right depth, helps it last.
Can you help a landlord with a rental near Brighton station?
Yes. We work for letting agents and landlords as well as householders, and several properties can go on one quote. You can call 0345 464 0079 or send us an email with the details for a clear quote.
What does external mastic cost?
Every job is different, so each one gets its own quote. For a quick quote, ring 0345 464 0079 or send us an email with a short description of the job.
Do you come to Seven Dials?
Yes. From our base in Crawley, we cover South East England, London and all of Scotland, and that includes Seven Dials.
How long before the joint can be used?
It depends on the product and the conditions. Before we leave, we’ll tell you the cure time.
How long does external mastic take?
It depends on the size of the job, but as a guide it takes anything from a few hours to several days, depending on the building. We’ll give you a better idea when we quote.
What’s an expansion joint in brickwork?
Walls move with heat, cold and moisture, so long walls have planned gaps to take that movement. The gap is sealed with a flexible sealant over backing rod.
Can you work on commercial sites?
Yes, regularly. Larger jobs can be planned room by room or area by area to suit the site.
External mastic in Seven Dials, done properly
Where two different materials meet, such as brick and render or blockwork and metal, they move at different rates. A flexible sealant bridges the two where mortar or filler would crack. We work on façade panels, joints between brick and frames and render & cladding joints, and the jobs we see most are rain getting behind render or cladding at a joint and joints pointed up with cement by mistake.
In and around Seven Dials, older properties sit alongside newer ones, each with its own outside joints. Older gutters and trims need their joints resealed; newer brick and render need their movement joints kept sound.
Each job carries a 12-month guarantee, whatever its size.
- Where
- Seven Dials (BN1, BN3, BN50)
- Wider area
- Brighton and Hove
- Guarantee
- 12 months on all our work
- Price
- A clear price before we start
- Call
- 0345 464 0079
- Page updated
- 26 October 2026
Places near Seven Dials
What else we do in Seven Dials
Different surfaces, different methods
Concrete and blockwork
Blockwork and concrete shrink over time and move with the seasons. We reseal their joints with backing rod and a flexible product.
Render joints
Rendered walls have joints at beads, openings and changes of material. We reseal them with a flexible exterior sealant that suits the render colour.
What affects the cost of external mastic
There’s no set price list, because no two jobs are the same. What we look at:
- Whether the work is at height
- The product the joint needs
- The old material and how stubborn it is
- How many areas need sealing
Every job is a little different, so we quote each one individually. Size, access and the product the joint needs all make a difference.
Asking for a quote
There’s no need for technical detail. It helps if you can tell us:
- Pictures of the joints, sent by email
- The address or postcode of the job
- If it’s domestic, commercial or a hotel
- The rough size of the job
To get a quote, ring 0345 464 0079 or drop us an email and tell us where the job is and what the problem looks like. We’ll give you a clear quote before any work starts.
Why deal with it now?
Running new sealant over the old bead rarely lasts. The new layer cannot bond properly to old, weathered material, so the old joint is cut out fully first. Homes in smaller places like Seven Dials can face more weather, and failed outside joints let damp into walls. Indoors, a failed seal lets water into floors and panels as it would anywhere.
Leaving a failed joint generally makes the job bigger, not smaller, because water and mould keep working on it. If you are not sure whether it needs doing, call 0345 464 0079 or email us and we’ll give you an honest view and a quote.
What you get with us
- Trusted Arbo and Everbuild sealants
- Anti-fungal sanitary silicone in wet areas
- ARBOMaster approved applicator
- You choose the colour before work begins
Read our cost guide and customer reviews.
Landlord and commercial work in Seven Dials
Failed sealant is one of the commonest items on a check-out report. We can quote for more than one property at once.
Whether it’s one flat or a portfolio, the work is the same standard: the old material taken out, careful preparation and a 12-month guarantee.
What happens on the day
Before we leave, we go over the finished joints with you and tell you how long to leave it. The work normally takes anything from a few hours to several days, depending on the building, depending on the size of the job. In a smaller place like Seven Dials, parking is seldom the issue; lanes, gates and long drives are worth mentioning. If the job is outside, tell us about side access and how high the joints are.
- We inspect the joints and agree which need resealing and how they’ll be reached.
- The old mastic and anything lodged in the joint is removed.
- We clean both faces of the joint and prime them where the product calls for it.
- Backing rod goes in next, setting the depth and keeping the sealant off the back of the joint.
- A flexible exterior sealant is applied and tooled in a colour to suit the wall.
How to prepare
- Let us know about stairs, lifts or work at height
- Let us know about earlier repairs to the joints
- For business premises, tell us about site rules or sign-in
Get a quote
It all starts with a short chat. Describe the problem, the location and the size of the job. Whenever you’re ready, call 0345 464 0079 or send us an email.
Read more
How to look after the new joints
How long the joints last depends on use and care. We suggest:
- Avoid pressure-washing directly into sealant joints
- Check external joints each spring
- Deal with leaking gutters that soak the joints below
- Point out the joints to other trades
Make sure anyone working on the wall later knows where the movement joints are. They should be kept open and resealed, not filled.
A joint that has stopped moving pushes the movement elsewhere, often as cracks near the joint. Catch it early and you reduce the risk.
When to call us in Seven Dials
Sometimes a movement joint was filled with mortar or a rigid filler by mistake. The joint can’t move, so the wall cracks somewhere else instead.
Look out for these signs:
- Sealant that has lost its bond to the brick or render
- Movement joints with cracked, split or missing sealant
- Hard, crazed mastic that has stopped moving
- Plants rooting in failed movement joints
Rented homes near Brighton station change hands often, and failed wall and movement joints let damp in, so they’re worth checking between tenancies.
Comparing quotes
- Who turns up on the day
- What product goes in the joint
- How long to leave it before use
- How long the guarantee is
What external mastic looks like in Seven Dials
Seven Dials is close to the coast, where wind-driven rain is a fact of life and, nearer the shore, so is salt air. Both are hard on movement joints and outside wall joints, which can dry out and crack sooner where a building faces the weather. With historic houses such as Royal Pavilion (about 0.7 miles south-east) nearby, there’s older building stock in the area around Seven Dials as well as newer homes. In older buildings, older walls and rooflines need a sealant that moves with them and suits the material.
If you live in an older home near St Luke's Church Prestonville, older walls, gutters and the joints where extensions meet them need a flexible sealant.
Seven Dials is about 1 mile west of Brighton, in Brighton and Hove. We carry out external mastic for homes and businesses in Seven Dials and nearby, as part of our work across Brighton and Hove. Seven Dials is one of 30 towns and villages in Brighton and Hove we cover.
Here we cover the BN1, BN3 and BN50 postcode area for external mastic. External mastic is available to properties on Dyke Road, Powis Road and York Avenue. Seven Dials is on the A2010, which makes it straightforward to reach with everything needed for external mastic. If you are just outside Seven Dials, we cover West Hill (1 mile south-east), Prestonville (1 mile north), Brunswick (1 mile south-west), Brighton (1 mile east) and Hanover (1 mile east). Further out, we also cover Hangleton (3 miles north-west), Saltdean (5 miles east), East Saltdean (6 miles east), Roedean (3 miles south-east), Rottingdean (4 miles east) and Ovingdean (3 miles east). As one of the bigger places in Brighton and Hove, Seven Dials has every kind of property, from flats to offices.
Local landmarks in Seven Dials
Typical jobs here are in homes near Stanford Junior School, The Cow pub and St. Ann's Well Gardens and the streets around them. Seven Dials has its own railway station: Brighton station. Nearby you’ll also find Montefiore Hospital (within half a mile west) and Brighton Transport Museum (0.6 miles north). Not far away are Newmarket Hill and Whitehawk Hill.